feat(show): add comma-separated ID support for multi-task viewing

- Enhanced get-task/show command to support comma-separated task IDs for efficient batch operations.
- New features include multiple task retrieval, smart display logic, interactive action menu with batch operations, MCP array response for AI agent efficiency, and support for mixed parent tasks and subtasks.
- Implementation includes updated CLI show command, enhanced MCP get_task tool, modified showTaskDirect function, and maintained full backward compatibility.
- Documentation updated across all relevant files.

Benefits include faster context gathering for AI agents, improved workflow with interactive batch operations, better UX with responsive layout, and enhanced API efficiency.

docs/tutorial.md

@@ -198,10 +198,15 @@ Ask the agent to list available tasks:
 What tasks are available to work on next?
 ```
 
+```
+Can you show me tasks 1, 3, and 5 to understand their current status?
+```
+
 The agent will:
 
 - Run `task-master list` to see all tasks
 - Run `task-master next` to determine the next task to work on
+- Run `task-master show 1,3,5` to display multiple tasks with interactive options
 - Analyze dependencies to determine which tasks are ready to be worked on
 - Prioritize tasks based on priority level and ID order
 - Suggest the next task(s) to implement
@@ -221,6 +226,21 @@ You can ask:
 Let's implement task 3. What does it involve?
 ```
 
+### 2.1. Viewing Multiple Tasks
+
+For efficient context gathering and batch operations:
+
+```
+Show me tasks 5, 7, and 9 so I can plan my implementation approach.
+```
+
+The agent will:
+
+- Run `task-master show 5,7,9` to display a compact summary table
+- Show task status, priority, and progress indicators
+- Provide an interactive action menu with batch operations
+- Allow you to perform group actions like marking multiple tasks as in-progress
+
 ### 3. Task Verification
 
 Before marking a task as complete, verify it according to: